Alert archive / Texas / Flash Flood Warnings in 1987

Flash Flood Warning 67, NWS Austin/San Antonio, TX

June 10, 1987Medina County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jun 10, 1987, 8:09 PM CDT for Medina County, Texas. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Jun 10, 1987, 8:09 PM CDT (01:09 UTC)
Expired
Jun 10, 1987, 11:15 PM CDT
In force
3 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Medina County, TX

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 1.2 hours before the alert went out and 168 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Del Rio, TX at 00:00Z on 1987-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1795 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Del Rio, TX at 00:00Z on 1987-06-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 7 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1795 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
1176 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
7 m²/s²
0-3 km storm-relative helicity
-3 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KSAT 110109
FFWSAT
TXC325-110415-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
809 PM CDT WED JUN 10 1987
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 1115 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTH TEXAS
          ...MEDINA
 
AT 805 PM HONDO RADAR INDICATES THUNDERSTORMS PRODUCING VERY HEAVY RAI
OVER EASTERN MEDINA COUNTY AND OTHER THUNDERSTORMS ARE MOVING INTO
THE SOUTHERN PORTION OF THE COUNTY. THESE THUNDERSTORMS ARE MOVING TO
THE NORTH AT AROUND 15 MPH. FM ROAD 1343 IN EASTERN MEDINA COUNTY HAS
BEEN CLOSED DUE TO HIGH WATER. MANY CREEKS AND LOW WATER CROSSINGS IN
THE NORTHERN PART OF THE COUNTY ARE RISING DUE TO RUNOFF FROM HEAVY
RAIN IN BANDERA COUNTY.
 
REMEMBER...DEATHS DURING FLASH FLOODING ARE FREQUENTLY RELATED TO
MOTORISTS DRIVING INTO FLOODED LOW WATER CROSSINGS OR FROM CHILDREN
PLAYING NEAR FLOODED STREAMS OR DRAINAGE AREAS.
 
YOU SHOULD ASK THE NEAREST LAW ENFORCEMENT AGENCY TO RELAY YOUR
SEVERE WEATHER REPORTS TO THE LOCAL NATIONAL WEATHER SERVICE OFFICE.
 
PLEASE LISTEN TO YOUR LOCAL RADIO...TV OR NOAA WEATHER RADIO STATION
FOR LATER STATEMENTS OR WARNINGS REGARDING THIS+ SEVERE WEATHER EVENT.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR HAS BEEN
REPORTED.

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jun 10, 5:14 PM CDT, 2 hours 55 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DEL RIO TX
513 PM CDT WED JUN 10 1987

AT 510 PM CDT NO PRECIPITATION WAS OCCURRING IN VAL VERDE COUNTY.

WATER FROM THE  HEAVY RAINS THAT OCCURRED EARLIER TODAY IN SUTTON
COUNTY...2 1/2 INCHES WAS REPORTED EAST OF OZONA...HAS FINALLY MADE
ITS WAY INTO NORTHERN VAL VERDE COUNTY. HIGHWAY 189 IN THE NORTHERN
PART OF THE COUNTY FROM THE JUNCTION OF HIGHWAY 163 NEAR JUNO TO THE
NORTHERN VAL VERDE COUNTYA LINE IS CLOSED. THE HIGHWAY DEPARTMENT
REPORTED NEARLY 8 INCHES OF WATER WAS OVER THE ROAD ON SOME OF THE
LOW WATER CROSSINGS.

MOTORISTS TRAVELING IN NORTHERN VAL VERDE COUNTY ALONG HIGHWAY
189 SHOULD NOT ATTEMPT TO CROSS LOW WATER CROSSINGS.
Special weather statement, Jun 10, 7:43 PM CDT, 26 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DEL RIO TX
743 PM CDT WED JUN 10 1987

AT 735 PM CDT RADAR INDICATED RAINSHOWERS AND THUNDERSTORMS
IN NORTHEASTERN VAL VERDE COUNTY...35 MILES NORTH OF DEL RIO BETWEEN
LOMA ALTA AND JUNO. THE STRONGEST THUNDERSTORM WAS IN THE EXTREME
NORTHEAST PORTION OF THE COUNTY. MOVEMENT OF THE THUNDERSTORMS WAS TO
THE NORTH AT 15 MPH.

SMALL HAIL...HEAVY RAIN...STRONG GUSTY WINDS AND FREQUENT DANGEROUS
LIGHTNING ARE POSSIBLE WITH THESE STORMS.

WATER FROM THE  HEAVY RAINS THAT OCCURRED EARLIER TODAY IN SUTTON
COUNTY...2 1/2 INCHES WAS REPORTED EAST OF OZONA...HAS FINALLY MADE
ITS WAY INTO NORTHERN VAL VERDE COUNTY. HIGHWAY 189 IN THE NORTHERN
PART OF TkHE COUNTY FROM THE JUNCTION OF HIGHWAY 163 NEAR JUNO TO THE
NORTHERN VAL VERDE COUNTY LINE REMAINED CLOSED.

MOTORISTS TRAVELING IN NORTHERN VAL VERDE COUNTY ALONG HIGHWAY
189 SHOULD NOT ATTEMPT TO CROSS LOW WATER CROSSINGS.

The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 11, 10:45 AM CDTFlash Flood WarningEWXGuadalupe3 hr
Jun 11, 11:14 AM CDTFlash Flood WarningEWXBexar106 min
Jun 11, 12:55 PM CDTFlash Flood WarningEWXBexar2 hr
Jun 11, 6:47 PM CDTFlash Flood WarningEWXReal3 hr

Nearby

Flash Flood Warnings in Texas, 1987Every flash flood warning in 1987

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.